Color stability of ceromer veneers/resin cements after accelerated ageing
10.3760/cma.j.issn.1002-0098.2014.02.010
- VernacularTitle:人工老化对瓷聚体-树脂水门汀联合体颜色稳定性的影响
- Author:
Likai WANG
1
;
Yanan LIU
;
Yan ZHENG
;
Pingping LI
;
Lianshui SHI
Author Information
1. 100068,中国康复研究中心北京博爱医院口腔科
- Keywords:
Esthetics,dental;
Resin cements;
Composite resins
- From:
Chinese Journal of Stomatology
2014;49(2):111-114
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the color stability of ceromer veneers/resin cements after accelerated ageing,and to provide the reference for clinical application and choice.Methods Fifteen groups of ceromer veneers/resin cements samples,five samples in each group,were prepared as experimental groups.In the fifteen groups,ceromer veneers in three thickness (1.00,0.75,0.50 mm) and resin cements of five shades(A1,A3,B 0.5,WO,TR),were matched through permutation and combination.Three groups of ceromer veneers with different thickness (1.00,0.75,0.50 mm) were used as control groups.All samples were put into xenon lamp ageing instrument to accelerate ageing.Spectrophotometer were used to measure the lightness(L*),red green color(a*) and blue yellow color(b*) of samples before and after accelerated ageing process,and the change of lightness (△L),red green color (△a),blue yellow color (△b) and color variation(△E) were calctlated.We investigated the effect of thickness of ceromer veneer and color of resin cement on color variation by using analysis of variance.Results The thickness factor and color factor showed significant effect on △E values,and they have interaction (P ＜0.05).The △E values of all experimental groups were lower than 3.3.After accelerated ageing,all L* values of experimental groups decreased,and △L values were lower than 2.0.Conclusions The thickness of ceromer veneer and the color of resin cement could both affect the color stability of ceromer veneers/resin cements.The changes of lightness and color in ceromer veneers/resin cements were considered clinically acceptable after accelerated ageing.
